Ok, my 94 Grand prix with a 3100 has a mis fire. So I pulled the wires, and noticed one cylinder wasn't firing quite right.
I pulled the plug, and cleaned it up. During the cleaning process, I noticed that the element on the plug (where the spark shoots out during firing) WIGGLES. I mean, I can actually see it moving inside the ceramic. I checked another plug, and it doesn't do this. My question is .. should the electrode wiggle in the ceramic?
To recap, I got a plug that the element (part that shoots spark into the cylinder) wiggles. It shouldn't, correct?